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Plant Physiol, July 2001, Vol. 126, pp. 1331-1340

Sequence and Analysis of the Tomato JOINTLESS Locus1

Long Mao, Dilara Begum, Stephen A. Goff, and Rod A. Wing*

Clemson University Genomics Institute, 100 Jordan Hall, Clemson, South Carolina 29634 (L.M., D.B., R.A.W.); and SYNGENTA, 3050 Science Park Road, San Diego, California 92121 (S.A.G.)

A 119-kb bacterial artificial chromosome from the JOINTLESS locus on the tomato (Lycopersicon esculentum) chromosome 11 contained 15 putative genes. Repetitive sequences in this region include one copia-like LTR retrotransposon, 13 simple sequence repeats, three copies of a novel type III foldback transposon, and four putative short DNA repeats. Database searches showed that the foldback transposon and the short DNA repeats seemed to be associated preferably with genes. The predicted tomato genes were compared with the complete Arabidopsis genome. Eleven out of 15 tomato open reading frames were found to be colinear with segments on five Arabidopsis bacterial artificial chromosome/P1-derived artificial chromosome clones. The synteny patterns, however, did not reveal duplicated segments in Arabidopsis, where over half of the genome is duplicated. Our analysis indicated that the microsynteny between the tomato and Arabidopsis genomes was still conserved at a very small scale but was complicated by the large number of gene families in the Arabidopsis genome.

1 This work was supported by the National Science Foundation (grant to R.A.W.) and by the Coker Chair in Plant Molecular Genetics (to R.A.W.). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.

* Corresponding author; email rwing{at}clemson.edu; fax 864-656-4293.

© 2001 American Society of Plant Physiologists


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